When the first American settlers took up the practice of cave art, they made sure to depict themselves as being well-endowed. Archaeologists call the rock-carving you see here — a stick figure with a penis the size of its arm — "the little horny man." And while it's definitely an amusing name, it's also compelling…

This carving may not look like much, but it's possibly the oldest art ever found in Britain. The rock art appears to depict a reindeer with a spear sticking out of it. Hunter-gathers did tend to carve what they knew.